Pet fountain



FIG. 1 is a top, front and right side perspective view of a pet fountain showing my new design;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a front elevation view thereof;

FIG. 5 is a rear elevation view thereof; and,

FIG. 6 is a right side elevation view thereof, the left side being a mirror image of the right side shown. 

CLAIM The ornamental design for a pet fountain, as shown and described. 